Window-screen.



No. 875,826. I PATENTED JAN. 7, 1908.

' G. H. KNOWLES.

WINDOW SOREEN..

urmpnmn mum JULY 13. 1000. nnnnwnp nov. 21, 1907.

4 WWW wm e UNITED STATES PATENT OFFICE.

CHARLES H. KNOWLES, OF FAIRFIELD, MAINE.

WINDOW-SCREEN.

To all whom it may concern:

Be it known that I, CHARLES H. KNowLEs, a citizen of'the United Statesof America, and resident of Fairfield, Maine, have invented certain newand useful Improvements in VVindow-Screens, of which the following is aspecification.

My invention relates to a window screen l such as are used for excludingflies, and

order to fit particularly, windows because I there is little latitudefor variation as they are generally constructed, to allow fordifferences in the casing of windows supposed to be. of the same size.

The object of my invention is to make a screen which will havesufficient lateral expansibility to fit all windows having the samesized glass, which may be applied quickly and easily from the inside andwithout the necessity of nailing strips to the casing and which may beraised and lowered sufiiciently for all practical purposes.

In carrying out these objects I make a screen in theusual way with endand side bars, one of the side bars having cooperating with it alaterally movable extension bar forced outward by springs and held tothe side bar with suitable guides. The screen is held in laceimmediately outside of the up er sas against outward displacement by hoding plates which are a plied to the inner faces of the side bars andextend outward into the groove occupied by the upper sash,

one of these holding plates being secured to the extension bar and beingcapable of being retracted to allow the screen to be placed in ositionfrom the inside of the window. As construct the screen, it is heldagainst inward displacement or liability to be pushed inward by lateralprojections on the outer face preferably at or near the lower ends ofthe side bars, these projections bearing against the outer face of thewindow casing which is generally of uniform thickness in all housesnamely about inches or a trifle thinner than the thickness of thescreen. This fact enables me to make use of Specification of LettersPatent.

Patented Jan. 7, 1908.

' Application filed July 13,1906. Serial No. 326.104. Renewed November21,1907. Serial No. 403.190.

this construction and to avoid the necessity of using special strips.

I illustrate my inventionby means of the accompanying drawing in-whichFigure 1 is an elevation of the screen looking from the inside, Fig. 2is a section on y y of Fig. 1 and Fig. 3 is a section on :1; m of Fig.1.

The screen is made up in the usual manner with the end bars I) and b andside bars (1 and c. As here shown, one of the side bars is rabbeted outat its inner face and in the rabbet is placed the flat extension bar ewhich acts to take up the variations in the different windows fitted.The extension ha f 6 is so mounted that it has a lateral mo-- tion withrespect to the side bar 0. As here shown, the connection is made by pins(2 in the inner edge of the extension bar which pass through and slidein openings through the bar a. Springs are provided between the inneredge of the bar a and the rabbeted portion of the bar 0 for forcing thebar e outward against the casing of the window. The amount of play ofbar 6 is such that when at its inner position the screen will just passthrough the narrowest window that would be found with the Width of glasswhich the screen was intended to be used for and when at its outerposition the edge of the bar 6 would be something more than wide enoughto reach the casing. a

The screen is held in place in the window against outward displacementby holding plates which are secured to the inner face of the side barspreferably about in the center and which project out far enough to catchthe shoulder formed by the outer portion of the groove occupied by theupper sash.

On one side is the stationary late (1 fixed to the side bar (1 withscrews and having pfieferably on its inner end a handle by w 'ch; thescreen is handled, the outer end of the plate projecting beyond the edgeof the bar.

he holdin plate F on the opposite bar is slidably he (1 both withrelation to the extension bar e and the side bar C and it per- 1 formsthe function of retractin the extension bar and holding the screen in pace. As here shown, it is connected with the bar 2 by means of a screw fassing through slots f so that when retracted it first draws back theouter end of the plate thus freeing the screen and allowing it to beswung. inward and upon bein further retracted it draws in the extensionar thus releasin the screen from the friction caused by t e outwardpressure of the bar against the casin'g. The plate F is as here shownprovided with means whereby it ma be clamped to the bar to hold theplate 1n its outer position so that it cannot be accidentally withdrawn.For this purpose as'hereshown, I provide a thumb screw f engaging anopenin in the side bar in connection with a slot in the holding plate.On the inner end of the late {is a handle to be used in connection witthe andle of plate (1 for manipulating the plate and also for handlingthe screen. The screen is held against the inward displace-' ment oragainst any forcetending to ress it inward at the top by resting againstt e outside of the lower rail of the upper sash and as to the lowerportion of the screen by lateral projections n and n on the outer faceof the side bars. preferably at their lower ends. These projections maybe small metal plates projecting beyond the edge of screen and restagainst or in proximity to the outer face of the window casing as abovestated.

From what has been said the operation and advantages of my screen areapparent. When it is desired to put in the screen, the thumb screw f 3is loosened, the bar e and the plate F drawn into their inner positionsin which condition the screen is passed through the window to theoutside by tilting it and the side of the screen carrying the bar at maybe inserted at an angle the bar d resting against the casing justoutside the groove of the upper sash the end of the plate (1 restingagainst the outer edge of the groove, and pro jection 'n against theouter face of the window casing. The'bar C can now be swunginward-clearing the casing until it reaches the same position as bar dand with the upper bar I) brought to rest against the outside of thelower rail of the upper sash and projection n coming against the outerface of the casing The lower bar of the screen isbeveled to rest on theinclined sill of the window. Having inserted'the screen, the plate F isreleased and the bar e immediately springs out and presses against thecasing '1', and by pushing out the plate F its and projects into theoove 7' .of the upper sash. The plate F is t en locked in place by thethumb screw f. It will be seen that when held in this position thescreen can be raised by sliding it upward until the plates F and (2 comeagainst the lowerrail of the upper sash. It is held firmly against bothinward and outward displacement and forms tight joints with the casingand upper sash. A screen made in this manner with allowance made forvariation in the widths. of windows which use the same width of glassmay be made and ke t in stock by ardware and other stores an be insertedby the purchaser without any fixtures being attached to the house.

The holding plate F may if desired be immovably fixed to the extensionbar' e with its outer end projecting out beyond the edge of the bar, bytightening the thumb screw f as shown in Fig. 1, the playof the barlaterally being sufiicient to allow the same to be drawn in by thecasing when the bar is retracted. This arrangement however, is lessdesirable than that described since it would require a larger amount ofplay for the bar e to cover the same variations in different sizes ofWindow casing. V

I claim 1. The herein described window screen having end bars and sidebars, a lateral extension bar slidably connected with one of the s idebars, -a holding plate adjustably mounted on the inner face of saidextension bar to extend beyond the outer edge of the extension bar, anda holding plate on the inner surface of theopposite side bar'ex:

tending beyond the outer edge of said side bar.

2. The herein described window screen having end bars and side bars, alateral extension bar slidablyconnected with one of the side bars, aholding plate adjustably mounted on the inner face of said bar to extendbeyond the outer edge of the extension bar, means for'clamping theholding plate to the side bar, and a holding plate on the inner surfaceof the opposite side bar extending beyond the outer edge of said sidebar.

3. The herein described window screen having end bars and side bars, alateral extension bar slidablyfconnected with one of the side bars,springs for holding said extension bar in its outer position, a holdingplate mounted on the extension bar to extend be yond the outer edgethereof, means for clampin said holding plate to the side bar, and a hoding plate on the opposite side bar ex-- outer edge of the extensionbar, and a holding plate on the opposite side bar.

5. The herein described window screen having end bars and side bars, oneof said side bars being rabbeted out on its inner face, a lateralextension bar held in said rabbet,

pins in the inner edge of said extension bar and holes in the side barfor the passage of said pins, springs between the inner edge of theextension bar and the su'rfaceof the side bar for forcin the extensionbar outward, a holding plate av'ing horizontal slots, screws passingthrough one or more of said slots for adjustably securing said plate tothe extension bar, a thumb screw passing through one of said slots forsecuring the plate to the sidebar and a holding plate on the op ositeside bar extending beyond the outer er ge thereof.

, 6. The herein described wlndow screen having end bars and side bars, alateral extension bar slidably connected with one of the side bars,springs for holding said extension bar in its outer position, a holdingplate provided with horizontal slots, screws passing through some of theslots for adjustably securing the holding plate to the inner surface ofthe extension bar, said holding plate being adapted to have its outerend project beyond the outer edge of the extension bar, a thumb screwpassing through one of the slots in the holding plate to clamp theholding plate to one of the side bars, and a holding plate on the oposite side bar.

7. he herein described window screen having end bars and side bars, alateral extension bar slidably connected with one of the side bars, aholding plate adjustably mounted on the inner face ofsaid extension barto extend beyond the outer edge of the extension bar, a holding plate onthe inner surface of the opposite side bar extending beyond the outeredge of said side bar, and lateral extensions on the outer face of thelower portion of the screen to bear against the outer surface of thewindow casing.

8. The herein described window screen having end bars and side bars, alateral extension bar slidably connected with one of the side bars, aholding plate adjustably mounted on the inner face of said extension barto extend beyond the-outer edge of the extension bar, and having ahandle formed on its inner end, and a holding plate on the inner surfaceof the opposite side bar extending beyond the outer edge of said sidebar.

9. In combination with a window casing, including beads arranged to formsash guides, and a sash mounted in the guides, of a window screen havingend bars and side bars, two oppositely disposed "holding plates mountedon the inner surface of the sidebars intermediate the ends thereof, oneof said plates being movably mounted, two oppositely disposed holdingplates secured to the outer surfaces of the side bars at their lowerends, said screen being associated with the window casing so that itsinner surface is flush with the outer surface of the upper sash, theholding plates projecting beyond the side bars of the screen andengaging the side surfaces of the opposite outer beads of the casing.

In witness whereof I have hereunto set my hand this 30th day of 'June,1906.

CHARLES H KNOWLES.

WVitnesses:

S. W. BATES,

MARY A. DONALDSON.

